Steam-sawyer.



PATENTED APR. 9, 1907.

2 sums-sum 1.

mom/Us INVENTOH figvfierz 996113911 7 NQ r// 8. V. ABREGO. STEAM SAWYER'.

APPLICATION FILED IAY6.1905.-

WITNESSES".- 0'7.

No. 849,958. PATENTED APR. 9, 1907.

. S. V.- ABREGO.

STEAM SAWYER. APPLICATION FILED MAY 6. 1905.

2 SHEETS-SHEET 2 WITNESSES: ra

UNITED sTATEs PATENT OFFICE.

STEPHEN VALENTINE ABREGQOF LAKE CHARLES, LOUISIANA.

srl-zAm sAwvss.

- Specification of Letters Patent.

Eatented April 9, 1967.

. Application filed May 6, 1905. Serial No. 259,128.

scription.

This invention relates to improvements in devices for controllin the valves of a steamfeed for sawmill-carriages, the object being to provide a steam-actuating mechanism for shifting the valves, thus relieving an attend ant or sawyer from a greater art of the work no re uired to'shift the va ves manually.

wil describe a steamsawyer embodyin my invention and then oint out the, nove features in the -ap ende claims.

Reference is to e had to the accompanying drawings, forming a part of this specifics? tion', in which similar characters of reference indicate corresponding parts in allthe figures.

Figure 1 is a side elevation of a steam-saw' yer embodyin my invention. Fig. 2 .is a section on the line 2 2 of Fig. 1. Fig. 3 isan elevation of the valve-controlling motor, and

Fig; 4 is a section through the controllingmotor.

Referring to the drawings, 5 designates th bed of the mill, 6 the carriage movable thereon, and 7 the saw. Arranged along the bed is a cylinder 8, in which the piston operates in the usual manner, the stem Qof the piston being connected to a hanger 10 on the carriage 6. A steam-sup ly'pipe 11 has branch. connections 12 13 wt .the opposite ends of the cylinder 8, and in these branches "are valves 14 15, the two valves being connected together by a rod 16, so that when the rod is moved in one direction one valve will be open and the other closed.

From a rock-shaft 1 7 an arm 18 extends downward and has a link connection 19 with the rod 16. On the outer end of the rockshaft 57 is an upwardly-extended arm 20,

havin a link connection 21 with the lower end 0 a'lever 22, pivoted at about its center to the bed-frame. From the upper end of the lever 22 a rod 23 extends to a connection with {a cross-head 24, movable on ways 25, and-this cross-head is engaged or connected to a piston-rod -26 of a I iston operating in the steam-cylinder 27 nth'e steamcylin der 27 is a steam-chest 'and valve-casing 28, which receives steam through a pipe 29, and

type.|

Pivoted to a cross-bar 30 of an upwardlyextended frame 31 is a lever 32, the lower end cross-head 24. The upper :end of the lever 32 is quite short, as its movement is limited.

a link 34, and mounted to swing on this link 34 is a lever 35, the lower end of said lever 35 having connection with the valve-stem 36. Pivoted to the upper cross-bar of the frame 31 is a valve-actuating lever 37, the lower end of which is connected to the up or end of the lever 35 through the medium of a link 38.

In the operation in starting the device an attendant by throwing the lever 37 to the left will shift the valve in the casing 28 to the left, opening the ports to the right-hand end 'of the cylinder 27. The steam therein will ,force the piston forward, which will swing the lever 22, causing the opening of the valve 14 and the closing of the valve 15. Therefore steam will enter the right-hand end of the ward. By the movement of the cross-head in the direction above indicated, the lever 32 will be swung, causing the lever 35 also to swing andmove the slide-valve toward the right-hand end of the casing 28 to close the port leading into the right-handend of the cylinder 27. Thus it will be seen that the engine or motor notonly controls the valves for supplying steam to the cylinder 8, but also controls the slide-valvejto' cause an auin the cylinder'27 reaches its forward stroke and the slide-valve'is'in the right hand end of the casing 28 steam will be, admitted to the left-hand end of the cylinder 27 and the .ation 'the following may be added: The valve 39 is of the piston type-that is, it is round, so as to make it-a balance-valve by having steam against both ends. Thevalve it takes steam at one end, but it exhausts at the other end, and when the operator throws the lever 37 forward the piston on the stem 26 moves until the automatic lever operates admitted in theopposite end of thee linder until the pressure becomes equal at hot ends,

and then the pistoncomes to a stop; When the valve therein may .be of the ordinary slide of which has a link connection 33 with the This upper end has pivotally connected to it Cylinder 8, causing the carriage to move fortomatic cut-off. Of course when the piston the valve. to close the exhaust, and steam is valves reversed, so that the carriage carrying the log will return to its first osition.

As for a clearer under'stan ing of the oper-.

too

is the reverse of an ordinary engine-valve, as 1 matic lever will cut'ofi the exhaust and equalize both ends.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- A device for shifting the valves for controlling the admission of steam to a motor for operating a sawmill-carriage, comprising a steam-engine, a cross-head having connection with the stem of the piston in the engine, a connection between said cross-head and said controlling-valves, a slide-valve for controlling the admission of steam to the en the upper end ofthe gine-cylinder, a stem extended from the 2oslide-valve; a lever having connection at its lower end with said cross head, a link exa connection at its" between said mamially-operated lever and lever having connection with the valvestem'. I

In testimony where of I have signed my name to this specification in the presence of two subscribing witnesses.

. STEPHEN VALENTINE ABREGO. i

Witnesses B. BROWN; 'lHAD MAYO. 

